Rotary drawworks



June M, M2 v s. FAULKNEQET AL fi fl I ROTARY DRAWWORKS 7 Original FiledJune 21, 1926 5 Shee'tsSheeo' 1 June 14, 1932.

D. s. FAULKNER ET AL 1,863,401

ROTARY DRAWWORKS Original Filed June 21, 1926 5 Sheets-Sheet 2 PatentedJune 14, 1932 UNITED STATES PATENT OFFICE DAVID S. FAULKNER AND EDWARDTIMBS, F LOS ANGELES, CALIFORNIA, ASSIGNOBS TO THE NATIONAL SUPPLYCOMPANY O PORATION' OF DELAWARE F DELAWARE, OF NEW YORK, N. Y., A. (103-EOTARY IDRAWWQRKS Original application filed June 21, 1926, Serial No.117,322. Divided and this application filed November 9, 1927. Serial No.232,08d.

This inventionrelates to a rotary drawworks such as is employed in therotary process of drilling Wells. 1

Thisapplication is a division of our copending application for rotarydrawworks, filed June 21, 1926, Serial No. 117 ,322.

The principal object of this invention is to provide a rotary drawworksin Whichthe.

distance bet-ween the drawworks posts is maintained at a minimum andwhich drawworks includes a drum of relatively large size, and which drumis constructed of a spool upon which brake rims brake bands of novelconstruction are positioned and held equally spaced or positioned uponthe said brake rims by means of cables secured to the rotary drawworksbeam and to the floor of the well derrick.

Another object of this invention is to provide a third speed rotarydrawworks in: which clutches are provided for releasably clutching thespeed sprockets to the drum shaft and in which drawworks construction,novel control means are provided for the actuation and control of thesaidclutches.-

Another object of this invention is to provide a rotary drawworks drumconstruction in which means are provided for securing the 2 cable whichis wound upon the drum firmly in position to the brake flange so as toavoid the possibility of breaking the'line loose from the drum and Wearupon the end ofthe line where the same is secured.

Other objects and advantages of this invention will be apparent from thefollow ing detailed description of a preferred embodiment thereof, asillustrated in the accompanying drawings, in which drawings:

Figure 1 is a diagrammatic top plan view of a well derrick illustratinga rotary drawworks as embodying this invention as positioned therein.

Figure 2 is a side elevation partly in vertical mid-section of a rotarydrawworks embodying this invention.

Figure 3 is an end elevation thereof, illus- I trating the low speedsprocket as broken away to illustrate the forged brake rim constructionand brake bands mounted thereon. V Figure 4 is a fragmental sectionalfront elevation illustrating the third speed. clutch mechanismembodiedin this invention as illustrating the same as mounted upon afragment of the drum shaft. v

Figure 5 is an end elevation thereof, taken substantially on the .line5-5 of Figure 4.

Figure 6 is a fragmental sectional view illustrating the clutch faces ofthe third speed clutch mechanism illustrated in Figure: 4.

Figure 7 is a detached fragmental view of a brake bandconstructionembodied in this invention and illustrating the brakesecuring means as provided for securing the dead end of the brake bandsembodied in this invention. j v

Figure 8 is a fragmental top plan view illustrating the unitary controlsupportingmechanism for the controls for the clutch means for each ofthe three speed clutches of the rotary drawworks, embodied in thisinvention. v

In the preferred embodiment of this invention, illustrated in theaccompanyingy drawings, 1' illustrates the floor of the'well derrick.Mounted in the floor of the derrick is' a rotary drilling machine 2which is operated for the purpose of rotating the rotary drill stem (notshown), to the end of which the drilling bit (likewise not shown) isse-.

cured for drilling the hole in the ground to the depth required ordesired. The rotary drill stem is supported upon a hydraulic swivel,which is likewise not shown but which compact as possible, that is, thatthe distance between the outer posts 5 and 6 thereof be maintained at aminimum so that the rotary drive sprocket 6a, which is carried upon theline shaft 7 of the rotary draw.-

* works 4 will align with the drive sprocket rotary drawworks 4 will notbe extended too 8 of the rotary drilling'machine or apparatus 2, andalso so that the catheads 9 of the far from alignment with the table 10of the rotary machine 2, as the catheads 9 are employed with a cat linein a manner well understood in the art for operating the tongs and, likedevices as used for the screwing up and unscrewing of the drill stemsections and for like purposes during the rotary process of drilling.

. flanges thereof, but that the diameter of the It is also essential ina rotary drawworks that the line drum 3 thereof be in position spool ofthe drum 3 be large so as to prevent variation of the speed of travel ofthe line 11 which is Wound thereon as the said lineis coiled upon thesaid spool. The increasing depth of wells, of'course, necessitates theprovision of increased drum area for winding of the line cable and thisincreased demand for length of the drum 3 mustnot require an increasedspreading of the posts 5 and 6 of the drawworks 4. In order to permitwide variation of operation of the rotary drawworks, according to theconditions met during the drilling of the well, it is preferable thatthe drawworks be rovided with considerable speed variation or drivingthe drum 3. For this purpose, the drawworks is provided with threespeeds,

I any one of which may be operated to drive the drum 3. The line shaft 7of the rotary drawworks 4 is driven by means of a motor or engine 12which is positioned exteriorly of the derrick 1' and is connectedthrough a ering chain drive with a sprocket 13 which is'rigidly securedto the line shaft 7.

The line shaft 7 is journaled in bearings which are secured to the endposts 5 and 6 and the third post 14 of the drawworks4. The

rotary drive sprocket 6a is loosely journaled J. upon the shaft 7 and ispreferably provided with a jaw-clutch 15' for releasably engaging thesprocket 6a with the line shaft 7 when it f -is desired to operate therotary machine 2, and which sprocket 6a maybedisengaged.

from the line shaft 7 when it is desired to operate the'rotary drum 3for hoisting or lowthe' drill stem into the well-hole being formed. Thejaw-clutch 15 may be of any desired or preferred construction and isherein illustrated as comprising a clutch collar 16 which isslidablykeyed to the shaft 7 so as to permit longitudinal movement of the-collar16 on the shaft 7 and so as to prevent rotationof the collar 16 relativeto the shaft 7 so that the jaw engaging face 17 of .the clutch collar 16may be moved into engagement with the jaw clutch engaging face 18 whichis preferably formed integral with the hub of the sprocket 6a. Thecollar 16 has an annular groove formed therein into which pins carriedby the fork 19 extend for sliding the collar 16 on the said shaft 7.The.

fork 19 is pivotally supported by means of a bracket 20, which bracket20 is secured to the beam 21 which connects the posts 5, 6, and 14 ofthe drawworks at their upper end. An actuating .rod 22 is secured to thefork 19 at a pin 23 and is secured to an actuating lever 24 at itsopposite end ata pin 25. A pawl and ratchet latchmeans26 are providedfor latching the clutch collar 16 into driving engagement with thesprocket 6a and the pawl and ratchet means and actuating lever 24 arepositioned at the left of the drawworks, as illustrated in Figure 3, soas to permit easy access of the operator of the drawworks from suchposition. Keyed to a the line shaft 7 is a low speed sprocket 27, anintermediate speed sprocket 28 and a high or third speed sprocket 29. v

. Mounted below the line shaft 7 and in bearings 30 is a drum shaft 31,upon which drum shaft 31' low,- intermediate and third speed sprockets32,- 33 and 34 are journaled, each ofwhich sprockets is provided withclutch means for 'releasably engaging the same with the drum shaft 31,as will hereinafterbe described. The drum 3 is keyed to the drum shaft31 and is preferably constructed of a spool 35, which spool 35 ispreferably constructed of a cylindrical portion36 which has, at itsopposite end, downwardly inclined integral flanges 37 which are formedintegral .with the oppositely extendinghubs 38 which are keyed to theportions 39 of increased di-. anieter of the drum shaft 31. A pluralityof webs 40 are cast integral with the cylindrical portion 36 of the drum3 for removing the same. Formed integral with the spool .35 areoutwardly extending annular flanges 41 which are formed at the oppositeend of the cylindrical portion 36.

Forged-rolled brake rims 42 are provided,

which forged rolled brake rims are preferably composed of a singleportion of steel forged while hot in a manner similar to the orging ofrims for machine car wheels and the like and during the forging arerolled at their, outer edge with a downwardly extending flange 43 whichprovides a cooling solution retaining rim for maintaining a coolingsolution within the brake rim for cooling 7 the same during brakingoperations. The

outer edge of the rim 42 is also formed with an upwardly extendingflange 44 which proband 45 against lateral movement upon the end of thedrum 3. This hub 38 at the right vides a retaining rim for retaining thebrake rim 42. The brake rim 44 rovides a braking surface 46 which is preerably hardened by any of the well known processes and the rim 42 isformed at its inner end with an inwardly extending annular flange 47,which annular flange 47 provides an edge shoulder 48 which fits the edgeshoulder 49 formed by the annular abutment 50 which is formed integralwith the flanges 41 of the spool 35.

Rivets 51 are counter-sunk inthe flanges 41 and extend through theannular flange 47 and are riveted over within the brake rims 42 so thata substantially flat surface is maintained at the interior of the spoolflanges 41. The annular flange 47 of the brake rim 42is cut away at aplurality of points to accommodate keys 53 which fit within the cut awayrecesses and which are secured to the.

flanges 41. The keys 53 are preferably secured to the flanges 41 bymeans of countersunk rivets 55. The rivets 51 and 55 are preferablycold-pressed into position by means of a jack interposed between theflanges 41 and their inner ends are then heated by means ofan acetylenetorch, or the like, and riveted over by the use of a hydraulic rivetingmachine.

The hub 38' at the left-hand en of the spool 35 is formed so as toextend into the interior of the forged brake rim 52and of sufficientlength or extent to provide a firm hearing support forthe drum 3 at thatend and extends into the drum 42 so as to engage the end face 56-of thelow speed sprocket 32 upon the drum shaft 31. In order to accommodatefor the clutch 57 of the third speed sprocket 34, the hub 38 formed atthe right end of thespool 35 extends inwardly into the interior of t ecylindrical portion 36 of the spool 35 and extends only slightly intothe interior (if the right hand rim 42 and is of suflicient extent toprovide a firm bearing support at this hand end of the spool 35 extendsinwardly into position as before described, so as to permit the mountingof the clutch collar 58 on the line shaft 31 for releasably securing thethird speed sprocket 34 to the shaft 31.

The clutch means provided for clutching the third speed sprocket 34 tothe drum shaft 31 is preferably composed of a clutch collar 58 which iskeyed to the shaft 31 so as to be -longitudinally slidable' thereon andis proj vided at its end engaging face with a cylindrical cut awayrecess 63 which has formed on its inner face 64 a plurality of clutchprojections 65 which are adapted to engage the clutch segments 66 whichare formed integral with the hub 67 of the third speed sprocket 34,

which third speed sprocket 34 is loosely journaled upon the shaft 31 andis maintained :5 against endwise motion at its outer end by engagementwith the end of the bearing 30 which is secured to the third post 14 ofthe drawworks and in which shaft 31 is jour-' naled. The collar 58 hasan annular recess 68 formed therein into which pins 69, carried by thefork 70, project for sliding the clutch collar 58 longitudinally alongthe shaft 31. The fork 70 is pivotally secured to a bracket 71 at a pin72 and which bracket 71 is secured to the third post 14 of thedrawworks. The engaging clutch segments 65 and 66 of the collar 58 andsprocket 34, respectively, are formedwith tapered engaging edges73, asillustrated in Figure 6.

Clutch collars 74 and 75, having tapered engaging faces 76 and 77, arekeyed to the drum shaft 31 in position ,to engage the tapered engagingfaces 78 and 79 of the low and second speed sprocketsy 32 and 33,respectively. The clutch actuating yokes 80 .and 81 for these aforesaidclutch collars are pivotally supported by meansof brackets 82 and 83,respectively, which are secured to the respective posts 5 and 14 of thedrawworks. The yokes 80 and '81 are pivotally secured at pins 84 and 85,respectively, to actuating rods 86 and 86a which extend longitudinallyof the drawworks to the left hand end thereof. The fork 7 0 for thethird speed'clutch collar58 is rigidly secured to a curved actuatlnglever 87 and the curved actuating lever 87 is secured to the floor 1 ofthe derrick by means of a bracket similar to the bracket 84 and issecured to an actuating rod 88 which likewise extends longitudinally ofthe drawworks to the left end thereof.

The actuating rods 86 and 88 are secured to downwardly extendingprojections which are formed integral with the collars 89 which aremounted upon a shaft 90 which is supported in a bracket 91 secured tothe derrick floor. The collars 90 at their opposite faces have arms 92formed integral therewith so that the collars 89 with the arms 92 andthe downwardly projecting arm which connect with the actuating rods86'and 88 form bearing crank levers which are secured at their innerends at pins 93 which are passed through ears 94 formed integral withfoot actuating pedals 95 so that as the foot actuating pedals 95 aredepressed, the rods 86 and 88 will be actuated to engage or disengagethe respective clutches for theishaft 2 or third speed of the rotarydrawworks, as

desired'by the operator.

As illustr ted, the pedal 96 is the first speed control, the pedal 97 isthe second speed of this invention as it enables amore easy, safe, andaccurate control of the drawworks and so centralizes the controls.

The brake bands 45 which are mounted upon the brake rims 42 arepreferably constructed of a band 102, to whichband 102 the brake lining103-is secured by means of counter-sunk bolts or rivets 104 which arecountersunk in the brake lining 103 and extend through the brake band102. The brake lining 103 is sawed at a plurality of points 105 so as toenable the same to more accurately follow the contour of the brake rims42. Any suitable or desirable form of brake actuating means 106, as iswell understood in the art, maybe provided for actuating the brake bandsand the live end 107 of .the brake band 45 is secured to this brake .isscrew-threaded to the end of the eye-bolt 109 so as to adjustably andfirmly secure the dead end 108 ofthe brake bands 45. Lock means areprovided for locking the collar 112 in the adjusted position, which lock.means preferably comprise a lock link 113 I which is pivotally securedat a pin 114 supported by the "bracket 111 and which lock link 113 has alocking recess 115 formed at its engaging end of substantially the shapeto engage the hexagonal head 116 of the collar 112 so as to preventrotation of the collar 112 on. the eye bolt 109.

Means are provided for supporting the brake bands 45 so that the samewill not drag upon the brake rims 42 when not in use, which meanspreferably comprise a cable 117 which is secured 'to a turn-buckle 118,and which turn-buckle 118 is at its opposite end secured to the beam 21of ther'otary draw works. The cable 117 passes through a clip 119secured to the rear face of the brake band 102 and extends'around thebrake band 102 and is secured to the derrick floor at 120 so as tosupport and hold up the brake band 45 when it is not desired to operatethe same. The turn-buckle 118 permits accurate adjustment of thisholding means so as to adjust the non-operating position of the brakecured to the drawworks posts, a drum shaft band 45.

In order to lock the assembly of the clutch collar 58 and sprocket 34 onthe shaft 31 between the hub 38 of the drum 3 and the post 14, a lockwasherk130 is provided which engages the key end 'of the keys on whichthe collar 58 is splined. The lock washer 130 is provided with recesses131 into which said keys fit. The washer 130 engages the sprocketassembly 66 at the end of the hearing I its driving sprocket 29.

Having fully. described a preferred em- I sleeve 132 on which thesprocket is j ournale'd on the shaft 31. The hub 67 of sprocket 34 abutsthe bearing assembly in which shaft recesses 131 and thereby provides athrust bearing washer for the sprocket 34, maintaining said sprocket 34in alignment with bodiment of our invention, it is to be understood thatwe do not wish to be limited to the exact details herein set forth,which may obviously be varied without departing from the spirit of ourinvention, as set forth'in the appended claims.

We claim:

1. In combination works comprising a spool, a drum shaft, hubs formedintegral with the spool for securing the said spool to the shaft, one ofwhich hubs extends inwardly into the said spool, forged rolled brakerims secured to the said spool, a clutch collar'mounted on the saidshaft, substantially in engagement with the end face of the said hub andwithin the interior of one of the forged rolled brake rims set cured .tothe said spool, a clutch sprocket journaled on the said shaft, and levermeans extending into the interior of the said forged rolled brake rimsfor moving the said clutch collar longitudinally on the said drum shaftfor engagement with the said sprocket.

2. In a rotary drawworks, the combination of a plurality of spacedposts, a line shaft journaled in bearings secured to the posts; a drumshaft journaled in bearings secured to the said posts below and inadvance of the line shaft, means'for driving the.

line shaft, first, second, and third. speed drive means between the lineshaft and the drum shaft, separate means on the drum shaft for engagingeither of the said speed drive means with the said drum shaft, a controllever for each of said engaging means, an actuating rod secured .to eachof the said actuating levers and extending longitudinally of the drumshaft, and each of the said actuating rods being provided with anactuating pedal mounted in a common with a rotary draw- I bracketsecured inposition at one end of the drawworks.

3. In a rotary drawworks, the combination of a supporting structureincluding spaced posts, a line shaft journaled in bearings sejournaledin bearings below and in advance of the line shaft, a drum mounted onthe drum shaft, forged rolled brake rims secured to the drums at theopposite ends thereof, a

third speed drive sprocket journaled on the drum shaft adjacent thethird drawworks .post, the said drum having a hub which extends inwardlyinto the spool thereof, a-

clutch collar mounted on the drum shaft between the end face of the saidspool and the third speed drive sprocket substantially in engagementwith the end face of the said hub when moved to the non-engagingposition with the said third speed sprocket, and means secured to thesaid clutch collar and extending into the said forged rolled brake rimsfor moving the said collar longitudinally on the said drum shaftintoengagement with the said third speed sprocket.

4. In a rotary drawworks, the combination of a line shaft journaled inbearings secured to three spaced drawworks posts, a drum shaft journaledin bearings-secured to the said posts, a drum mounted on the said shaft,brake rims secured to and extending outwardly from said drum, a lowspeed drive connection between the line shaft and drum shaft, a secondspeed drive connection between the line shaft and drum shaft, and athird speed drive connection adjacent the third post of the drawworksand comprising a sprocket rigidly secured to the line shaft, a sprocketjournaled on the drum shaft adjacent the bearing mounted upon the thirdpost, a clutch collar rigidly secured in slidable relation on the drumshaft adjacent the drum, the clutch collar having a cylindrical cut awayrecess within which a plurality of cut projections are formed, thesprocket huh having a plurality of clutch segments formed thereon overwhich the said clutch collar projections are adapted to slide forsecuring thc said sprocket to the said shaft, and a forked actuatinglever secured to the clutch collar and extending within one of theibrakerims secured to the said drum.

5. In a rotary drawworks, the combination of spaced posts, a drum shaftjournaled in hearings on said posts, a drum secured to said shaft, asprocket journaled on the shaft, a clutch collar splined to said shaft,the clutch collar and sprocket being mounted on said shaft between theend of said drum and its adjacent post, a lock washer interposed betweenthe clutch collar and sprocket to hold 7 said shaft, a low speed driveconnection located between one endof the shaft and its adjacent post, ahigher speed drive connection into clutching engagement with saidsprocket.

Signed at Torrance, Calif, this 17th day of October, 1927.

DAVID s. FAULKNER. EDWARD TIMES.

said sprocket from moving longitudinally of said shaft and from saidpost, and means for driving said sprocket.

6. In a rotary drawworks, the combination of spaced posts, a drum shaftjournaled in bearings on said posts, a drum secured to said shaft, :1low speed drive connection to said shaft at one end of the drum, and ahigher speed drive connection to said shaft at the other endof saiddrum,the said higher speed drive connection including a sprocket journaled onsaid shaft, a clutch collar' splined on saidshaft, and a lock washersecured against rotation on said shaft and holding said sprocket againstmovement away from said post. p

7. In a rotary drawworks, the combination of a pair of spaced posts,ashaft rotatably supported by said postg, a drum secured to

